Monday, 17 March 2014 20:59

Sets and Subsets

By  Gideon
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Let C be the set of all possible animals.

Let be the subset of C that consists of all duck-billed animals.

Let B be the subset of C that consists of all mammals. 

We illustrate these sets in the following diagram:


Note that while we have chosen to display a poison dart frog, a coral snake, a jellyfish, an octopus, a duckling, a platypus, and a rabbit, the set C contains all animals (all organisms in the Kingdom Animalia) even those that are not shown.

Next we display the set A by itself:


 It contains all animals that are duck-billed, including duckilngs and platypuses.

B looks like this:


It contains all mammals, including rabbits and platypuses.


Read 1626 times Last modified on Monday, 17 March 2014 21:29
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